A pole-to-equator map of the Martian northern hemisphere, displayed in polar stereographic projections. The map is color-coded to indicate the MARSIS mean dielectric constant of a number of geological units.
Map credit: Figure courtesy of J. Mouginot et al.
Notes: For further details see Mouginot, J., et al., "Dielectric map of the Martian northern hemisphere and the nature of plain filling materials", 2012, Geophysical Research Letters, 39, L02202. DOI:10.1029/2011GL050286 For more information, see Mars Radar Finds Possible Ocean Sediments.